testing travis-ci #2

.travis.yml

@@ -1,25 +1,55 @@
 language: cpp
-compiler: gcc
-dist: trusty
 
 matrix:
     include:
-        - env:
-            - BUILD=Debug
-            - BINDIR=debug
-        - env:
-            - BUILD=Release
+        - os: linux
+          dist: trusty
+          compiler: clang
+          env:
+            - CC=clang
+            - CXX=clang++
+            - BUILDTYPE=Release
             - BINDIR=bin
-
-before_install:
-    #C++17
-    - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
-    - sudo apt-get update -qq
-
-install:
-    #C++17
-    - sudo apt-get install -qq g++-6
-    - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-6 90
+        - os: linux
+          dist: trusty
+          compiler: clang
+          env:
+            - CC=clang
+            - CXX=clang++
+            - BUILDTYPE=Debug
+            - BINDIR=debug
+        - os: linux
+          dist: trusty
+          compiler: gcc
+          addons: &gcc7
+            apt:
+                sources:
+                    - ubuntu-toolchain-r-test
+                packages:
+                    - cmake3
+                    - g++7
+                    - gcc7
+          env:
+            - CC=gcc7
+            - CXX=g++7
+            - BUILDTYPE=Release
+            - BINDIR=bin
+        - os: linux
+          dist: trusty
+          compiler: gcc
+          addons: &gcc7
+            apt:
+                sources:
+                    - ubuntu-toolchain-r-test
+                packages:
+                    - cmake3
+                    - g++7
+                    - gcc7
+          env:
+            - CC=gcc7
+            - CXX=g++7
+            - BUILDTYPE=Debug
+            - BINDIR=debug
 
 script:
     - cd build